feat: 全屏方式设置

lib/plugin/pl_player/models/fullscreen_mode.dart

@@ -7,3 +7,20 @@ enum FullScreenMode {
   // 始终横屏
   horizontal
 }
+
+extension FullScreenModeDesc on FullScreenMode {
+  String get description => ['自适应', '始终竖屏', '始终横屏'][index];
+}
+
+extension FullScreenModeCode on FullScreenMode {
+  static final List<int> _codeList = [0, 1, 2];
+  int get code => _codeList[index];
+
+  static FullScreenMode? fromCode(int code) {
+    final index = _codeList.indexOf(code);
+    if (index != -1) {
+      return FullScreenMode.values[index];
+    }
+    return null;
+  }
+}